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HOLLOWcage® for eTap AXS Red & Force 12spd derailleurs finally makes your AXS drivetrain whisper quiet. Our revolutionary mono-plate OSPW is the quietest and best shifting oversized derailleur cage for eTap AXS created to date. HOLLOWcage ® OSPW has a carbon-polymer mono-plate construction with bespoke, oversized, full ceramic bearings and the most advanced silencing pulleys ever made.

Sram eTap AXS is known to be louder than other drivetrains. Our HOLLOWcage® with Silent ” Xring Pulley™ ” completely eliminates this problem allowing you to enjoy the ride.

Size (Mass +/-1g): 69g
Color Lower lockring: PVD Rainbow, Black, Titanium, Red, Gold ; Upper lockring: Black
Compatibility: Sram eTap AXS Red & Force 12spd derailleurs. Works with 10-28T & 10-33T & 10-36T cassettes (check chain length calculation at the bottom). Not compatible with Sram XPLR and 11spd Red / Force. Works Only with AXS Flat Top chain.
Materials used: Carbon fiber-polymer matrix, 7075 Aluminium, rubber, ceramics
In the box Complete cage, lockring tool, special tool, 2x spare xring rubbers

The new era of silent pulleys. Meet the Silent ” Xring Pulley™ “

Does it bother you when you ride in a really quiet scenery, but you can still hear your bike’s drivetrain? This familiar clunking noise has been accompanying us on every ride for decades. It’s time for a change.

Common polymer pulleys are fairly loud, this has always been a norm. Aluminium pulleys are even worse as the material radiates the sound more than any polymer, making them louder. We are introducing a completely new generation of pulleys, which are able to reduce the sound level by 12-14dB when compared to stock pulleys. This corresponds to roughly 60% of the noise reduction. Practically speaking, the cage becomes very silent.

We use a patent pending solution, our special xring rubber suspended bands, that dampen the chain impact on the guide pulley teeth, therefore eliminating the engagement noise, which is the single biggest contributor to overall drivetrain noise. From now on, your ride is going to be more silent than it used to be and you will hear sounds that you haven’t noticed before. It’s the new era of derailleur cages



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